package string;

/**
 * 说明:
 *
 * @author:SuZhongHe
 * @date:2023/2/28
 **/
public class StringDemo {
    public static void main(String[] args) {
        String s1="123abc";
        String s2="123abc";
        String s3="123abc";
        System.out.println(s1==s2);
        System.out.println(s1==s3);
        System.out.println(s2==s2);
        s1=s1+"!";
        System.out.println(s1==s2);
        String s4=s3+"abc";
        System.out.println(s1==s4);
    }
}
